docs: build on tag and use github.ref_name for version. (#20)

.github/workflows/docs.yml

@@ -2,18 +2,15 @@ name: docs
 
 on:
   push:
-    branches: [main]
     tags: ["*"]
 
 permissions:
   contents: read
 
 jobs:
   docs:
-    # Force Github action to run only a single job at a time (based on the group name)
-    # This is to prevent race-condition in publishing a new version of doc to `gh-pages`
     concurrency:
-      group: on-docs-rebuild
+      group: docs
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -25,9 +22,6 @@ jobs:
           python-version: "3.10"
       - run: python -m pip install --upgrade wheel tox
       - name: Build docs website and API reference
-        env:
-          VERSION: ${{inputs.version}}
-          ALIAS: ${{inputs.alias}}
         run: |
-          tox -e docs -- deploy --push --update-aliases ${{env.VERSION}} ${{env.ALIAS}}
+          tox -e docs -- deploy --push --update-aliases ${{github.ref_name}}
           tox -e docs -- set-default --push latest